1b92

X-ray diffraction
2.02Å resolution

MOBILITY OF AN HIV-1 INTEGRASE ACTIVE SITE LOOP IS CORRELATED WITH CATALYTIC ACTIVITY

Released:

Function and Biology Details

Reactions catalysed:
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid
Endohydrolysis of RNA in RNA/DNA hybrids. Three different cleavage modes: 1. sequence-specific internal cleavage of RNA. Human immunodeficiency virus type 1 and Moloney murine leukemia virus enzymes prefer to cleave the RNA strand one nucleotide away from the RNA-DNA junction. 2. RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end. 3. DNA 3'-end directed cleavage 15-20 nucleotides away from the primer terminus.
Specific for a P1 residue that is hydrophobic, and P1' variable, but often Pro.
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assemblies composition:
monomeric (preferred)
homo dimer
Assembly name:
PDBe Complex ID:
PDB-CPX-146199 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Integrase Chain: A
Molecule details ›
Chain: A
Length: 163 amino acids
Theoretical weight: 17.93 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P12497 (Residues: 1197-1359; Coverage: 11%)
Gene name: gag-pol
Sequence domains: Integrase core domain
Structure domains: Ribonuclease H-like superfamily/Ribonuclease H

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: MACSCIENCE
Spacegroup: P3121
Unit cell:
a: 72.26Å b: 72.26Å c: 65.6Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.225 0.225 0.289
Expression system: Escherichia coli BL21(DE3)